BSOD games

Hi, bought a new computer about a month ago and it works good but when i play starcraft 2 i get BSOD I have already reformatted my computer and it still happens. I am running an Asus P8P67 Motherboard,Intel Core i7 Preocessor, MSI Geforce GTX 560 Video card, and also bought a water cooled heatsink. I suspect that I need a bigger power supply because it only happens when I play StarCraft 2. I have a Corsair Tx750w power supply, Is there anyway i can check this by going into BIOS? Any other suggestions as to why this would be happening would be great aswell.

3. Uninstall your video card drivers and reboot your PC into Safe Mode. Run Driver Sweeper but ONLY for the video card drivers. I had someone use it on their chipset drivers! If it doesn't find any video card drivers that is quite okay; just leave all other drivers alone.